Battery module and power battery

Abstract

The embodiment of the utility model provides a battery module and a power battery, and belongs to the technical field of power batteries. The battery module comprises a cover plate structure, a shell assembly and a plurality of battery cells, and the battery cells are sequentially arranged in the shell assembly at intervals; the cover plate structure covers the shell assembly, each battery cell is electrically connected with the cover plate structure, one side, facing the shell assembly, of the cover plate structure is provided with a flue gas channel, the flue gas channel is communicated with an exhaust part communicated with each battery cell, and an outlet of the flue gas channel is positioned at the end part of the shell assembly in the extension direction. When the battery cell discharges flue gas due to thermal runaway, the flue gas can be directionally discharged from the two ends of the battery module along the flue gas channel, so that the battery cell is prevented from directly discharging high-temperature flue gas to an exposed high-voltage part in a vehicle, and the effect of improving thermal runaway protection of the vehicle is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of power batteries, and in particular to a battery module and a power battery. Background Art

[0002] Power batteries are the power source for new energy vehicles and other electrical equipment, and can store and release electrical energy.

[0003] The power battery includes at least one battery module, which is electrically connected to and positioned near the vehicle's high-voltage components. The battery module comprises a housing, a cover plate, and multiple battery cells positioned within the housing. The cover plate is positioned over the housing and is equipped with an electrical connection structure that interconnects the battery cells. This structure allows the cover plate to collect and transmit electrical energy to the vehicle's high-voltage components.

[0004] However, when the existing battery modules experience thermal runaway, the smoke generated by the cells flows directly to the high-voltage parts of the vehicle, which can easily cause arc discharge and fire. Utility Model Content

[0005] The embodiments of the present application provide a battery module and a power battery, so as to improve the protection effect of the battery module when the battery cell suffers from thermal runaway.

[0006] In a first aspect, an embodiment of the present application provides a battery module, comprising a cover structure, a housing assembly, and a plurality of battery cells, wherein the battery cells are sequentially spaced apart within the housing assembly;

[0007] The cover plate structure is covered on the shell assembly, and each of the battery cells is electrically connected to the cover plate structure. The cover plate structure has a smoke channel on the side facing the shell assembly, and the smoke channel is connected to the smoke exhaust part of each of the battery cells. The outlet of the smoke channel is located at the end of the extension direction of the shell assembly.

[0008] In a possible embodiment, the battery module provided in the embodiment of the present application, the cover plate structure includes a bracket assembly and two electrical connection assemblies arranged on the bracket assembly, the bracket assembly is covered on the shell assembly and connected to the shell assembly, and the smoke channel is arranged on the bracket assembly, the explosion-proof valve of each battery cell is located in the smoke channel, the explosion-proof valve forms the smoke exhaust part, and the two electrical connection assemblies are respectively electrically connected to the positive and negative poles of each battery cell.

[0009] In one possible embodiment, in the battery module provided in the embodiments of the present application, the bracket assembly includes a mounting member and at least two support members, the extension directions of the mounting member and the support members are both consistent with the extension direction of the housing assembly, the support members are arranged at intervals on a side of the mounting member facing the battery cell, and two adjacent support members and a portion of the mounting member located between the two adjacent support members jointly form the flue gas channel;

[0010] The mounting member is connected to the housing assembly through the supporting member, and the electrical connection assembly is arranged on the other side of the mounting member away from the supporting member.

[0011] In a possible implementation, in the battery module provided in the embodiment of the present application, the mounting member is a mica board, and the supporting member is silicone foam.

[0012] In one possible embodiment, in the battery module provided in the embodiment of the present application, at least two rows of connection holes are arranged on the mounting member in sequence, through holes corresponding to the connection holes are provided on the support member, and a plurality of connecting members adapted to the connection holes are provided on the shell assembly, and the mounting member is detachably connected to the connecting member through the connection holes and the through holes.

[0013] In one possible embodiment, in the battery module provided in the embodiment of the present application, the electrical connection assembly includes a collection harness and a plurality of bus bars, the collection harness is arranged on the bracket assembly, and the bus bars are sequentially spaced apart on the collection harness, the extension direction of the collection harness and the spacing direction of the bus bars are consistent with the extension direction of the bracket assembly, and each bus bar is electrically connected to each battery cell one by one.

[0014] In a possible embodiment, the battery module provided in the embodiment of the present application, the shell assembly includes an outer shell and a plurality of spacers inserted in the outer shell at intervals, the spacers and the battery cells are alternately arranged in the outer shell, and the spacers are all detachably connected to the cover structure.

[0015] In one possible embodiment, in the battery module provided in the embodiment of the present application, the partition includes a thermal insulation member and an assembly member arranged on opposite sides of the thermal insulation member, the projection of the thermal insulation member toward the battery cell covers at least the battery cell, the assembly member abuts the battery cell, and the assembly member is detachably connected to the cover structure.

[0016] In a possible embodiment, the battery module provided in the embodiment of the present application, the shell assembly also includes at least two end plates, at least two of the end plates are located in the outer shell and are respectively arranged at both ends of the extension direction of the outer shell, and the end plates are provided with fins extending obliquely toward one side of the end plates, and the end plates are abutted against the battery cells through the fins.

[0017] In a second aspect, an embodiment of the present application provides a power battery, comprising a battery body and at least one of the above-mentioned battery modules, wherein the battery module is connected to the power battery.

[0018] The battery module and power battery provided in the embodiments of the present application are characterized in that the battery module is provided with a cover plate structure and a shell assembly so that the battery cells are interspaced and inserted into the shell assembly, and the cover plate structure is provided on the shell assembly so that the cover plate assembly is electrically connected to the battery cells, so that the cover plate assembly can collect and transmit the electrical energy of the battery cells to the high-voltage part of the vehicle while restricting the movement of the battery cells. No additional electrical connection bracket is required, making the battery module structure compact. A flue gas channel is provided on the side of the cover plate structure facing the battery cells, and the outlet of the flue gas channel is located at the end of the shell assembly. In this way, when the battery cells emit flue gas due to thermal runaway, the cover plate structure forms an isolation between the battery cells and the high-voltage part, and the flue gas can be discharged directionally from both ends of the battery module along the flue gas channel, thereby preventing the battery cells from directly emitting high-temperature flue gas into the exposed high-voltage part of the vehicle, preventing the high-temperature flue gas from contacting the high-voltage part and causing arc discharge, which in turn causes the vehicle to catch fire, thereby achieving the effect of improving the thermal runaway protection of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0020] Figure 1 A schematic diagram of a portion of the structure of the battery module provided in this application;

[0021] Figure 2 for Figure 1 Exploded view of the battery module;

[0022] Figure 3 for Figure 2 Schematic diagram of the structure of the middle bracket assembly;

[0023] Figure 4 for Figure 3 A structural diagram of the middle bracket assembly from another perspective;

[0024] Figure 5 for Figure 3 A schematic diagram of the partial structure of the middle bracket assembly from another perspective;

[0025] Figure 6 for Figure 2 Schematic diagram of the structure of the acquisition harness;

[0026] Figure 7 for Figure 2 Schematic diagram of the structure of the middle bus;

[0027] Figure 8 for Figure 2 Schematic diagram of the structure of the battery cell;

[0028] Figure 9 for Figure 2 Schematic diagram of the structure of the septum;

[0029] Figure 10 for Figure 2 Schematic diagram of the structure of the middle end board;

[0030] Figure 11 This is a schematic diagram of the structure of the battery module provided in this application.

[0031] Description of reference numerals:

[0032] 100 - cover structure; 101 - flue gas channel; 110 - bracket assembly; 111 - mounting member; 112 - support member; 113 - connection hole; 120 - electrical connection assembly; 121 - collection harness; 1211 - electrical connection piece; 122 - busbar;

[0033] 200-battery cell; 210-electrode terminal; 220-explosion-proof valve;

[0034] 300-spacer; 310-thermal insulation; 320-assembly parts; 330-connecting parts;

[0035] 400-end plate; 410-fin;

[0036] 500-shell assembly; 510-housing.

[0037] The above drawings illustrate specific embodiments of the present application, which will be described in more detail below. These drawings and the textual description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0038] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention. The following embodiments and features in the embodiments can be combined with each other unless there is a conflict.

[0039] As described in the background technology, the power battery is arranged in a position inside the vehicle close to the high-voltage part of the vehicle and is electrically connected to the high-voltage part of the vehicle. The power battery includes at least one battery module, and the battery module includes a shell, a cover plate and a plurality of battery cells arranged in sequence in the shell. The cover plate is arranged on the shell, and an electrical connection structure is provided on the cover plate. The battery cells are electrically connected to each other through the electrical connection structure, so that the cover plate can collect the electrical energy in the battery cell and transmit it to the high-voltage part of the vehicle.

[0040] However, the high-voltage components are relatively exposed inside the vehicle, and there are no isolation components between the power battery and the high-voltage components. Overheating or excessive pressure in the battery cells can lead to thermal runaway, generating high-temperature smoke. This smoke can easily flow directly into the high-voltage components of the vehicle, causing arc discharges in these components and potentially igniting a fire. Therefore, existing battery modules offer limited protection against thermal runaway.

[0041] In order to overcome the defects in the prior art, the battery module and power battery provided in the embodiments of the present application are provided with a smoke channel on the side of the cover structure facing the battery cell, and the outlet of the smoke channel is located at the end of the shell assembly. In this way, when the battery cell emits smoke due to thermal runaway, the cover structure forms an isolation between the battery cell and the high-voltage part, and the smoke can be discharged in a direction along the smoke channel from both ends of the battery module, avoiding the battery cell from directly emitting high-temperature smoke to the exposed high-voltage part in the vehicle, preventing the high-temperature smoke from contacting the high-voltage part to cause arc discharge and then causing vehicle fire, thereby achieving the effect of improving the vehicle's thermal runaway protection.

[0042] The content of the utility model will be described in detail below with reference to the accompanying drawings so that those skilled in the art can understand the content of the utility model more clearly and in detail.

[0043] Reference Figures 1 to 4 ,and Figure 11 As shown, the battery module of the embodiment of the present application includes a cover plate structure 100, a shell assembly 500 and a plurality of battery cells 200, and each battery cell 200 is sequentially spaced apart in the shell assembly 500;

[0044] The cover plate structure 100 is covered on the shell assembly 500, and each battery cell 200 is electrically connected to the cover plate structure 100. The cover plate structure 100 has a smoke channel 101 on the side facing the shell assembly 500. The smoke channel 101 is connected to the smoke exhaust part of each battery cell 200, and the outlet of the smoke channel 101 is located at the end of the extension direction of the shell assembly 500.

[0045] It can be understood that the shell assembly 500 is used to accommodate the battery cells 200. Specifically, multiple battery compartments can be arranged in sequence in the shell assembly 500, and the battery cells 200 can be inserted into the battery compartments one by one, or the battery cells 200 can be directly placed in the shell assembly 500. This application does not impose any restrictions on this.

[0046] After the battery cells 200 are set in the shell assembly 500, the electrode terminals 210 of each battery cell 200 are all located on the same side of the shell assembly 500. After the cover plate structure 100 is placed on the shell assembly 500, the battery cells 200 can be limited by the cover plate structure 100 to prevent the battery cells 200 from falling out of the shell assembly 500. The cover plate structure 100 is also electrically connected to the positive electrode terminals 210 and the negative electrode terminals 210 of each battery cell 200, respectively. In this way, the electrical energy in the battery cells 200 can be collected and centrally transmitted to the high-voltage part of the vehicle through the cover plate structure 100 to power the vehicle. For example, the high-voltage part of the vehicle includes the motor that drives the vehicle, the controller that controls the speed and torque of the motor, and the cables and connectors that transmit electrical energy and electrical signals.

[0047] A flue gas channel 101 is also provided on the side of the cover plate structure 100 facing the housing assembly 500. The flue gas channel 101 is connected to the battery cells 200, and the outlet of the flue gas channel 101 is located at the end of the housing assembly 500. Therefore, when the battery cells 200 emit flue gas due to thermal runaway, the flue gas emitted by each battery cell 200 will flow into the flue gas channel 101, flow along the flue gas channel 101 to the outlet, and further be discharged from the outlet. Because the outlet of the flue gas channel 101 is located at the end of the housing assembly 500, that is, the cover plate structure 100 forms an isolation between the battery cells 200 and the high-voltage part, the flue gas can only be discharged from the two ends of the battery module and will not flow directly into the high-voltage part. This prevents the high-temperature flue gas from contacting the various components of the high-voltage part, preventing arc discharge and fire in the high-voltage part.

[0048] Therefore, the battery module provided in the embodiment of the present application sets a cover structure 100 and a shell assembly 500, so that the battery cells 200 are inserted at intervals in the shell assembly 500, and the cover structure 100 is set on the shell assembly 500, so that the cover assembly is electrically connected to the battery cells 200, so that the cover assembly can collect and transmit the electrical energy of the battery cells 200 to the high-voltage part of the vehicle while restricting the movement of the battery cells 200, without setting up additional electrical connection brackets, so that the battery module structure is compact. A flue gas channel 101 is provided on the side of the cover structure 100 facing the battery cell 200, and the outlet of the flue gas channel 101 is located at the end of the shell assembly 500. In this way, when the battery cell 200 emits flue gas due to thermal runaway, the cover structure 100 forms an isolation between the battery cell 200 and the high-voltage part, and the flue gas can be discharged from both ends of the battery module along the flue gas channel 101 in a direction, thereby preventing the battery cell 200 from directly emitting high-temperature flue gas to the exposed high-voltage part in the vehicle, preventing the high-temperature flue gas from contacting the high-voltage part to cause arc discharge and then causing vehicle fire, thereby achieving the effect of improving the thermal runaway protection of the vehicle.

[0049] In some embodiments, reference Figures 1 to 7 ,and Figure 11 As shown, the cover structure 100 includes a bracket assembly 110 and two electrical connection assemblies 120 arranged on the bracket assembly 110. The bracket assembly 110 is covered on the shell assembly 500 and connected to the shell assembly 500, and the smoke channel 101 is arranged on the bracket assembly 110. The explosion-proof valve 220 of each battery cell 200 is located in the smoke channel 101. The explosion-proof valve 220 forms a smoke exhaust part, and the two electrical connection assemblies 120 are respectively electrically connected to the positive and negative poles of each battery cell 200.

[0050] The bracket assembly 110 is covered on the shell assembly 500 and connected to the shell assembly 500. Specifically, the bracket assembly 110 can be connected to the outer edge portion of the shell assembly 500, or it can be connected to the connection structure between the battery cells 200 in the shell assembly 500. This can ensure the limiting effect of the cover structure 100 on the battery cells 200 and ensure the stability of the connection between the cover structure 100 and the shell assembly 500.

[0051] Furthermore, the bracket assembly 110 is stably connected to the shell assembly 500, and the smoke channel 101 is arranged on the bracket assembly 110. The stability of the bracket assembly 110 can also ensure the structural stability of the smoke channel 101 and will not be blocked due to pressure from above the battery module.

[0052] When the battery cell 200 emits flue gas, the flue gas is mainly discharged from the explosion-proof valve 220 of the battery cell 200. Therefore, a flue gas channel 101 is provided corresponding to the explosion-proof valve 220 of each battery cell 200, so that the explosion-proof valve 220 is located in the flue gas channel 101, so that the flue gas channel 101 can collect the flue gas discharged by the battery cell 200 more concentratedly, and guide the flue gas to the two ends of the shell assembly 500, and discharge it from the two ends of the shell assembly 500, thereby improving the protection effect of the cover structure 100 on thermal runaway of the battery cell 200.

[0053] The two electrical connection components 120 are respectively connected to the positive and negative electrode terminals 210 of each battery cell 200, thereby ensuring that the electric energy of the battery cell 200 can be stably output. Figure 8 As shown, since the explosion-proof valve 220 of the battery cell 200 is disposed between the positive electrode terminal 210 and the negative electrode terminal 210 of the battery cell 200, an electrical connection assembly 120 can be disposed on either side of the bracket assembly 110 in its extending direction to connect to the bracket assembly 110, making the cover plate structure 100 more compact. The electrical connection assembly 120 can be connected to the bracket assembly, and the bracket assembly 110 can be used to provide mounting support for the electrical connection assembly 120, replacing the traditional electrical bracket structure. This reduces the cost of the cover plate structure 100 and improves the structural stability of the electrical connection assembly 120.

[0054] In specific implementation, refer to Figures 3 to 5 ,and Figure 11 As shown, the bracket assembly 110 includes a mounting member 111 and at least two support members 112. The extension directions of the mounting member 111 and the support members 112 are consistent with the extension direction of the shell assembly 500. The support members 112 are arranged at intervals on the side of the mounting member 111 facing the battery cell 200. The two adjacent support members 112 and the part of the mounting member 111 located between the two adjacent support members 112 together form the flue gas channel 101; the mounting member 111 is connected to the shell assembly 500 through the support member 112, and the electrical connection assembly 120 is arranged on the other side of the mounting member 111 away from the support member 112.

[0055] Support members 112 are spaced apart on the side of mounting member 111 facing battery cell 200. Thus, the two support members 112 and the portion of mounting member 111 between them form flue gas passage 101, eliminating the need for additional piping and simplifying the structure of flue gas passage 101. Support members 112 are located between battery cell 200 and mounting member 111, helping to create a gap between them, thereby forming flue gas passage 101.

[0056] By arranging that the extension direction of the mounting member 111 and the support member 112 are consistent with the extension direction of the shell assembly 500, it can be ensured that the extension direction of the smoke channel 101 is consistent with the extension direction of the shell assembly 500, and the smoke channel 101 is made continuous as a whole, with outlets of the smoke channel 101 formed only at both ends of the shell assembly 500, so as to facilitate the centralized and directional discharge of smoke.

[0057] Specifically, the number of support members 112 provided corresponds to the number of columns of battery cells 200. If only one column of battery cells 200 is provided in the battery module, a corresponding column of explosion-proof valves 220 is formed on the battery cells 200. Two support members 112 are provided to form a flue gas passage 101, thereby achieving flue gas exhaust. If two or more columns of battery cells 200 are provided, three or more support members 112 are required, with a flue gas passage 101 formed between two adjacent support members 112, corresponding to a column of explosion-proof valves 220. Alternatively, a separate cover plate structure 100 may be provided for each column of battery cells 200, with each cover plate structure 100 corresponding to a flue gas passage 101. This application does not impose any restrictions on this.

[0058] By arranging the electrical connection component 120 on the other side of the mounting member 111 away from the support member 112, the electrical connection component 120 can be prevented from interfering with the flow of smoke in the smoke channel 101, and the smoke channel 101 can be made closer to the explosion-proof valve 220 to allow the smoke to be discharged smoothly, and the structure of the cover structure 100 can be made more compact.

[0059] The mounting member 111 is a mica board, and the supporting member 112 is silicon foam.

[0060] The mica board is made of mica paper and organic silicone water bonded in a certain proportion, heated and pressed, and has good high-temperature resistance and insulation properties. Therefore, using the mica board to form the mounting part 111 can effectively isolate the high temperature of the flue gas and the arc generated by the battery cell 200 from the high-voltage part when the battery cell 200 thermally runs away, thereby effectively reducing the impact of the thermal runaway of the battery cell 200 on the high-voltage part.

[0061] Silicone foam is a foam material made of silicone material, which has good flame retardant and insulating properties, and good resistance to compression deformation. It can form a stable support between the mounting part 111 and the battery cell 200, and avoid rigid contact with the battery cell 200, preventing the battery cell 200 from being over-pressurized, ensuring the stability of the structure of the battery cell 200, and also ensuring that the smoke channel 101 stably discharges the smoke when the battery cell 200 thermally runs away.

[0062] In some embodiments, reference Figure 5As shown, at least two rows of connecting holes 113 are arranged in sequence along the upper edge of the mounting member 111, through holes corresponding to the connecting holes 113 are provided on the supporting member 112, and a plurality of connecting members 330 adapted to the connecting holes 113 are provided on the shell assembly 500, and the mounting member 111 is detachably connected to the connecting member 330 through the connecting holes 113 and the through holes.

[0063] It is understood that the connection hole 113 can be a gourd-shaped hole with a larger diameter on one side and a smaller diameter on the other side along the radial direction of the hole, also known as a pear-shaped hole. A connector 330 corresponding to the connection hole 113 is provided on the housing assembly 500. The connector 330 can be a T-shaped buckle corresponding to the connection hole 113. When it is necessary to connect the mounting member 111 and the housing assembly 500, the connector 330 can be inserted from the large diameter side of the connection hole 113. Then, the mounting member 111 and the housing assembly 500 are moved relative to each other so that the connector 330 enters the small diameter side of the connection hole 113 from the large diameter side and is engaged on the small diameter side. This simplifies the connection operation between the mounting member 111 and the connector 330, and eliminates the need to set additional screws or rivets to fix the bracket assembly 110.

[0064] In some embodiments, reference Figures 1 to 3 ,as well as Figure 6 and Figure 7 As shown, the electrical connection assembly 120 includes a collection harness 121 and a plurality of busbars 122. The collection harness 121 is arranged on the bracket assembly 110, and the busbars 122 are arranged in sequence on the collection harness 121. The extension direction of the collection harness 121 and the spacing direction of the busbars 122 are consistent with the extension direction of the bracket assembly 110. Each busbar 122 is electrically connected to each battery cell 200 one by one.

[0065] Each busbar 122 is arranged in a one-to-one correspondence with the positive electrode terminal 210 or the negative electrode terminal 210 of the battery cell 200. The busbar 122 is welded to the electrical connection piece 1211 on the collection harness 121 to electrically connect the battery cell 200 to the collection harness 121, and is electrically connected to the high-voltage part of the vehicle through the collection harness 121 to realize power transmission.

[0066] The collection harness 121 can be a flexible printed circuit (FPC) or a flexible flat cable (FFC), so that the collection harness 121 has the characteristics of high wiring density, light weight, thin thickness, and good bendability. Double-sided tape is provided on the side of the collection harness 121 facing the mounting member 111 to facilitate bonding between the mounting member 111 and the collection harness 121.

[0067] Furthermore, in some embodiments, reference Figure 9As shown, the shell assembly 500 includes a shell 510 and a plurality of spacers 300 sequentially inserted into the shell 510 at intervals. The spacers 300 and the battery cells 200 are alternately arranged in the shell 510, and the spacers 300 are all detachably connected to the cover structure 100.

[0068] By setting up multiple spacers 300 and arranging the spacers 300 and the battery cells 200 alternately in sequence, the battery cells 200 can be separated by the spacers 300, thereby reducing heat transfer between the battery cells 200. When a single battery cell 200 thermally runs away, the impact of the battery cell 200 on other battery cells 200 can be minimized, thereby improving the overall thermal runaway protection capability of the battery module.

[0069] In specific implementation, refer to Figure 9 As shown, the spacer 300 includes a thermal insulation member 310 and an assembly member 320 arranged on opposite sides of the thermal insulation member 310. The projection of the thermal insulation member 310 toward the battery cell 200 covers at least the battery cell 200. The assembly member 320 abuts against the battery cell 200, and the assembly member 320 is detachably connected to the cover structure 100.

[0070] By setting up a thermal insulation member 310, the heat transfer between adjacent battery cells 200 is reduced. By setting up assembly parts 320 on opposite sides of the thermal insulation member 310, it is convenient to provide stable support for the thermal insulation member 310, wherein the connecting member 330 is set on the assembly part 320 on the side facing the mounting member 111, so that the spacer 300 is connected to the mounting member 111, thereby ensuring that the overall structure of the battery module is compact.

[0071] In addition, in some embodiments, reference is made to Figure 10 and Figure 11 As shown, the shell assembly 500 also includes at least two end plates 400, which are located in the shell 510 and are respectively arranged at both ends of the extension direction of the shell 510. The end plates 400 are provided with fins 410 that extend obliquely toward one side of the end plates 400, and the end plates 400 are abutted against the battery cells 200 through the fins 410.

[0072] By providing the end plate 400 so that the obliquely extending fins 410 on the end plate 400 abut against the battery cells 200, after the battery module is assembled, the end plate 400 can use the fins 410 to squeeze the battery cells 200 and the spacers 300 together, filling the gaps between the battery cells 200 and the housing assembly 500 and between the battery cells 200, ensuring a tight arrangement of the battery cells 200 and improving the stability of the battery cells 200. The fins 410 can also help dissipate heat from the battery cells 200, helping to reduce the possibility of thermal runaway of the battery cells 200.

[0073] An embodiment of the present application further provides a power battery, comprising a battery body and at least one battery module according to any of the above embodiments, wherein the battery module is connected to the power battery.

[0074] When only one battery module is set to form a power battery, it is equivalent to a module-free power battery (Cell To Pack, CTP), which omits or reduces the module assembly process and directly integrates the battery cells 200 into a battery pack. When two or more battery modules are set to form a power battery, it is equivalent to a traditional "battery cell-module-battery pack" three-level structure power battery.

[0075] The battery module has been described in detail in the above embodiments and will not be described again here.

[0076] The power battery provided in the embodiment of the present application is provided with a battery module. The battery module is provided with a cover structure 100 and a shell assembly 500, so that the battery cells 200 are inserted at intervals in the shell assembly 500, and the cover structure 100 is covered on the shell assembly 500, so that the cover assembly is electrically connected to the battery cells 200, so that the cover assembly can collect and transmit the electrical energy of the battery cells 200 to the high-voltage part of the vehicle while restricting the movement of the battery cells 200. There is no need to provide an additional electrical connection bracket, so that the battery module structure is compact.

[0077] A flue gas channel 101 is provided on the side of the cover structure 100 facing the battery cell 200, and the outlet of the flue gas channel 101 is located at the end of the shell assembly 500. In this way, when the battery cell 200 emits flue gas due to thermal runaway, the cover structure 100 forms an isolation between the battery cell 200 and the high-voltage part, and the flue gas can be discharged from both ends of the battery module along the flue gas channel 101 in a direction, thereby preventing the battery cell 200 from directly emitting high-temperature flue gas to the exposed high-voltage part in the vehicle, preventing the high-temperature flue gas from contacting the high-voltage part to cause arc discharge and then causing vehicle fire, thereby achieving the effect of improving the thermal runaway protection of the vehicle.

[0078] It should be noted that references in this specification to "one embodiment," "an embodiment," "an exemplary embodiment," "some embodiments," and the like indicate that the described embodiment may include a particular feature, structure, or characteristic, but not necessarily every embodiment includes that particular feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Furthermore, when a particular feature, structure, or characteristic is described in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not.

[0079] Generally speaking, terms should be understood, at least in part, based on the context in which they are used. For example, as used herein, the term "one or more" can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense, depending at least in part on the context. Similarly, terms such as "a," "an," or "the" can also be understood to convey either singular or plural usage, depending at least in part on the context.

[0080] It should be readily understood that “on,” “above,” and “over” in this application should be interpreted in the broadest manner, such that “on” means not only “directly on something,” but also includes “on something” with intervening features or layers therebetween, and “above” or “over” includes not only the meaning of “above” or “over,” but also includes “above” or “over” with no intervening features or layers therebetween (i.e., directly on something).

[0081] Additionally, spatially relative terms, such as "below," "beneath," "beneath," "above," and the like, may be used herein for ease of description to describe the relationship of one element or feature to other elements or features as depicted in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. The device may be otherwise oriented (rotated 90° or at other orientations), and the spatially relative descriptors used herein should be interpreted accordingly.

[0082] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A battery module, characterized in that: It comprises a cover plate structure (100), a shell assembly (500), and a plurality of battery cells (200), wherein the battery cells (200) are sequentially spaced apart in the shell assembly (500); The cover plate structure (100) is covered on the shell assembly (500), and each of the battery cells (200) is electrically connected to the cover plate structure (100). The cover plate structure (100) has a smoke channel (101) on a side facing the shell assembly (500), and the smoke channel (101) is connected to the smoke exhaust part of each of the battery cells (200). The outlet of the smoke channel (101) is located at the end of the extension direction of the shell assembly (500).

2. The battery module according to claim 1, wherein: The cover plate structure (100) comprises a bracket assembly (110) and two electrical connection assemblies (120) arranged on the bracket assembly (110); the bracket assembly (110) is covered on the shell assembly (500) and connected to the shell assembly (500); the smoke channel (101) is arranged on the bracket assembly (110); the explosion-proof valve (220) of each battery cell (200) is located in the smoke channel (101); the explosion-proof valve forms the smoke exhaust portion; and the two electrical connection assemblies (120) are respectively electrically connected to the positive electrode and the negative electrode of each battery cell (200).

3. The battery module according to claim 2, characterized in that The bracket assembly (110) comprises a mounting member (111) and at least two supporting members (112); the extending directions of the mounting member (111) and the supporting members (112) are both consistent with the extending direction of the housing assembly (500); the supporting members (112) are arranged at intervals on a side of the mounting member (111) facing the battery cell (200); two adjacent supporting members (112) and a portion of the mounting member (111) located between the two adjacent supporting members (112) together form the smoke channel (101); The mounting member (111) is connected to the housing assembly (500) via the support member (112), and the electrical connection assembly (120) is arranged on the other side of the mounting member (111) away from the support member (112).

4. The battery module according to claim 3, characterized in that The mounting member (111) is a mica board, and the supporting member (112) is silicon foam.

5. The battery module according to claim 3, characterized in that: At least two rows of connection holes (113) are sequentially arranged at intervals on the mounting member (111), through holes corresponding to the connection holes (113) are arranged on the support member (112), and a plurality of connection members (330) adapted to the connection holes (113) are arranged on the housing assembly (500), and the connection members (330) are detachably connected to the connection holes (113) via the through holes.

6. The battery module according to any one of claims 2 to 5, characterized in that: The electrical connection assembly (120) comprises a collection harness (121) and a plurality of busbars (122); the collection harness (121) is arranged on the bracket assembly (110); the busbars (122) are sequentially arranged at intervals on the collection harness (121); the extension direction of the collection harness (121) and the spacing direction of the busbars (122) are both consistent with the extension direction of the bracket assembly (110); and the busbars (122) are electrically connected to the battery cells (200) in a one-to-one correspondence.

7. The battery module according to any one of claims 1 to 5, characterized in that: The housing assembly (500) comprises a shell (510) and a plurality of spacers (300) sequentially and spaced apart and inserted into the shell (510); the spacers (300) and the battery cells (200) are alternately arranged in the shell (510), and the spacers (300) are detachably connected to the cover plate structure (100).

8. The battery module according to claim 7, characterized in that The spacer (300) comprises a heat insulating member (310) and assembly members (320) arranged on opposite sides of the heat insulating member (310); the projection of the heat insulating member (310) toward the battery core (200) covers at least the battery core (200); the assembly member (320) abuts against the battery core (200), and the assembly member (320) is detachably connected to the cover plate structure (100).

9. The battery module according to claim 8, characterized in that: The housing assembly (500) further comprises at least two end plates (400), the at least two end plates (400) being located within the housing (510) and respectively arranged at both ends of the extension direction of the housing (510), the end plates (400) being provided with fins (410) extending obliquely toward one side of the end plates (400), and the end plates (400) being in contact with the battery core (200) via the fins (410).

10. A power battery, characterized in that: It comprises a battery body and at least one battery module according to any one of claims 1 to 9, wherein the battery module is connected to the power battery.

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